Castle of Terror features a classic 5x3 grid layout with 20 fixed paylines. Wins form by landing matching symbols across these lines from left to right. Key symbols to watch for include thematic icons that align with the horror and fantasy themes, enhancing the eerie atmosphere. The game also incorporates 4096 ways to win, which means that adjacent symbols can create winning combinations, offering more frequent payouts. The inclusion of Megascatter symbols adds an extra layer of excitement, potentially triggering special features.

Castle of Terror accommodates a wide range of betting strategies with a minimum bet of €0.2 and a maximum of €100. Given its medium volatility, players should consider longer sessions to ride out the variance and capitalize on the game's features. The Bonus Buy option, while costly at 70 to 200 times the stake, provides a shortcut to the Free Spins, appealing to those who prefer immediate feature access.